.app-shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:100vh}.sidebar{background:#111827;color:#fff;height:100vh;position:sticky;top:0;overflow:auto;padding:1rem}.brand{display:flex;align-items:center;gap:.75rem;padding:.5rem .5rem 1.5rem}.brand-mark,.auth-brand{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:#fff;color:#111827;font-weight:900}.brand small{display:block;color:#9ca3af}.sidebar nav{display:grid;gap:.35rem}.nav-item{border:0;background:transparent;color:#d1d5db;text-align:left;padding:.8rem;border-radius:10px}.nav-item:hover,.nav-item.active{background:#1f2937;color:#fff}.app-main{min-width:0}.topbar{height:72px;background:#fff;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;padding:0 1.25rem;position:sticky;top:0;z-index:20}.topbar h1{margin:0}.page{padding:1.25rem;max-width:1440px;margin:0 auto}.drawer-overlay{display:none}.auth-page{min-height:100vh;display:grid;place-items:center;padding:1rem;background:#f3f4f6}.auth-card{width:min(440px,100%);background:#fff;border:1px solid #e5e7eb;border-radius:18px;padding:2rem;box-shadow:0 20px 50px rgba(17,24,39,.08)}.auth-brand{background:#111827;color:#fff;margin-bottom:1rem}